Malicious PDF — malware analysis report

Static analysis result for SHA-256 7267fb7af424ab14…

MALICIOUS

PDF

76.8 KB Created: 2021-02-15 21:34:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6f2b056867ab2e66f67d110fd8ea8918 SHA-1: fb6302305aca3c1dd8af809d4e912f585ed51461 SHA-256: 7267fb7af424ab14e1b3570ea346962f90b1e38ca0b83b1ca1b4890cb473ad22
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/strik?utm_term=308+175+grain+sierra+matchking+load+data PDF link annotation
    • http://mavpa.fun/2008_yamaha_v_star_1100_service_manualows8f.pdfIn PDF document text
    • http://lastmarkt.ru/sheetjs_xlsx_tutorial99sly.pdfIn PDF document text
    • http://klyshsheff.xyz/action_and_helping_verbs_worksheeta85xi.pdfIn PDF document text
    • http://tegor.xyz/branchement_table_de_mixage_sur_amplid65no.pdfIn PDF document text
    • https://soneputud.weebly.com/uploads/1/3/1/4/131411150/ditevarege.pdfIn PDF document text
    • http://zoomita.space/free_commas_worksheets_1st_gradelj3fd.pdfIn PDF document text
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/wojamu.pdfIn PDF document text
    • https://fokereja.weebly.com/uploads/1/3/1/8/131856005/3fe700a5521.pdfIn PDF document text
    • http://shopsmmv.site/16907850679lwllz.pdfIn PDF document text
    • http://hydrofthol.space/apush_chapter_4_reading_guide_answersaxeaq.pdfIn PDF document text
    • http://kind-insta.site/rtc_bus_app3ixng.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/51540555038.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/complete_guide_to_functional_training.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 6076 bytes
SHA-256: 89a4bb5f08a3c78717cfd433d13855c578020b8554f659f92125001f5ef14b2a
font_01_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 10416 bytes
SHA-256: 70c586c47941c9fe95b1578b92fe1b1d2ccadd9348d672d2257fd1a264dcf788

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